Dr. John Edward Mason, MD
- Medicare services, 2024
- 328
- Medicare patients, 2024
- 214
- Part D claims, 2024
- 86
- Hospital affiliations
- 1
- Industry payments
- $17,220
- Practice address
- 232 S Woods Mill Rd, Chesterfield, MO 63017
- Practice phone
- Call (314) 434-1500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mason's professional email, personal email and mobile number
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Dr. John Edward Mason is a general surgeon in Chesterfield, Missouri
Dr. Mason practices at St. Luke's Hospital in Chesterfield, Missouri, part of St. Luke's Episcopal-Presbyterian Hospital.
Dr. Mason's NPI, 1275528580, was assigned on September 13, 2005. Dr. Mason graduated from Washington University School of Medicine in 1993. Dr. Mason holds Missouri license 104004.
- NPI
- 1275528580NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537291273
- NPI enumeration date
- September 13, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 434-1500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Edward Mason practices at St. Luke's Hospital in Chesterfield, Missouri
Dr. Mason's primary practice is St. Luke's Hospital, at 232 S Woods Mill Rd, Chesterfield, MO 63017 in St. Louis County. The practice phone is (314) 434-1500.
- St. Luke's Hospital232 S Woods Mill Rd, Chesterfield, MO 63017 · St. Louis CountyPhone(314) 434-1500
Source: Dmand AI Affiliation Data
Dr. John Edward Mason is affiliated with 3 sites of care and 1 medical group
Dr. Mason's primary practice is St. Luke's Hospital in Chesterfield, Missouri, part of St. Luke's Episcopal-Presbyterian Hospital. The medical group on file is St. Luke's Medical Group. Dmand AI also links Dr. Mason to 1 more breast imaging center and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Edward Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Luke's Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Edward Mason is one of 593 general surgeons in Missouri
Surgery is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Mason is licensed in Missouri.
Specialties and state licenses
- Surgery, MissouriPrimary
General surgeons near Dr. Mason
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Edward Mason billed Medicare for 328 services in 2024
CMS data shows 328 Medicare services from Dr. Mason across 8 procedure codes in 2024, for 214 Medicare patients. Medicare paid $36,468 for them.
Dr. Mason's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2662024: 2847%
- Surgery
- 2023: 442024: 44No change
Where Dr. Mason's Medicare services took place, 2024
- In an office18255%
- In a facility14645%
Dr. Mason compared with the Missouri median for general surgeons, 2024
- Dr. Mason
- Missouri median
- Medicare services
- 328vs 16994% above
- Medicare patients
- 214vs 12769% above
- Part D claims
- 47vs 4115% above
Medians across 570 general surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Mason's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mason and other general surgeons in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Edward Mason treated 214 Medicare patients in 2024, average age 75
CMS counts 214 Medicare patients who saw Dr. Mason in 2024. The largest group is 65 to 74, with 104 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.21, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mason's median patient age at 69, with 38% women.
Dr. Mason's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mason's Medicare patients by sex, 2024
- Women9444%
- Men12056%
Chronic conditions among Dr. Mason's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Ischemic heart disease33%
- Anxiety29%
- Diabetes25%
- Atrial fibrillation24%
- Cancer24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women38%
- Men61%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Edward Mason wrote 86 Medicare Part D claims in 2024
In 2024, Dr. Mason wrote 86 Medicare Part D claims for 59 patients. 93% of them were for generic drugs. CMS names the drug for 47 of them, across 3 drugs with 11 or more claims each, at $177 in total drug cost. In 2023, CMS named 13 claims across 1 drug.
Dr. Mason's Part D claims by kind of drug, 2024
- Generic80 claims93%
- Brand-name and other6 claims7%
Dr. Mason's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mason's Part D claims, 2024
- Opioids36%31 of 86 claims
- Antibiotics41%35 of 86 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 132024: 47262%
Drugs named by CMS: 3 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John Edward Mason ranks in the 89th percentile for hernia repair (minimally invasive) in Medicare
Dr. Mason accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 21 procedures of hernia repair (minimally invasive) by Dr. Mason, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Mason ranks in Medicare procedure volume
- Hernia repair (minimally invasive)
- 89th percentile21 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Edward Mason received $17,220 in industry payments from 2016 to 2025
CMS Open Payments shows 205 general payments to Dr. Mason from 41 drug and device companies from 2016 to 2025. Education make up the largest share, 51% of the total. Intuitive Surgical, Inc. paid the most, $13,640.
General payments to Dr. Mason by program year, 2016 to 2025
General payments to Dr. Mason by kind, 2016 to 2025
- Education$8,75051%
- Food and beverage$6,26536%
- Travel and lodging$2,20313%
- Gifts$30%
Companies that paid Dr. Mason the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Edward Mason graduated from Washington University School of Medicine
Dr. Mason graduated from Washington University School of Medicine in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Edward Mason's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Edward Mason
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Edward Mason's NPI number?
Dr. John Edward Mason's NPI number is 1275528580. It was assigned on September 13, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Edward Mason?
Dr. John Edward Mason is a general surgeon in Chesterfield, Missouri. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John Edward Mason practice?
Dr. Mason practices at 232 S Woods Mill Rd, Chesterfield, MO 63017. Dr. Mason's primary practice is St. Luke's Hospital in Chesterfield, Missouri, part of St. Luke's Episcopal-Presbyterian Hospital. Dmand AI also links Dr. Mason to 1 breast imaging center and 1 group practice or clinic.
What is Dr. John Edward Mason's office phone number?
The practice phone on file for Dr. Mason is (314) 434-1500.
What is Dr. John Edward Mason's medical license number?
Dr. Mason holds Missouri license 104004.
Which hospitals is Dr. John Edward Mason affiliated with?
Dr. Mason practices at St. Luke's Hospital in Chesterfield, Missouri.
What medical group is Dr. John Edward Mason part of?
Dr. Mason is linked to St. Luke's Medical Group.
Does Dr. John Edward Mason accept Medicare?
Yes. CMS data shows Dr. Mason billed Medicare for 328 services in 2024, and Dr. Mason accepts Medicare assignment.
How many Medicare patients does Dr. John Edward Mason see?
CMS counts 214 Medicare patients who saw Dr. Mason in 2024, with an average age of 75.
What services does Dr. John Edward Mason bill to Medicare?
In 2024, Dr. Mason's most billed Medicare services were office visit, new patient (99202), office visit, established patient (99212) and hospital inpatient care (99222).
Show 4 more questionsShow fewer questions
Where did Dr. John Edward Mason go to medical school?
Dr. Mason graduated from Washington University School of Medicine in 1993.
What drugs does Dr. John Edward Mason prescribe most?
In 2024 Medicare Part D data, Dr. Mason's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Cephalexin and Sulfamethoxazole-Trimethoprim.
Has Dr. John Edward Mason received payments from drug or device companies?
CMS Open Payments shows $17,220 in general payments to Dr. Mason from 41 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. John Edward Mason been practicing?
Dr. Mason graduated from medical school in 1993, 33 years ago.
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